My sister's flight was from Jackson, Mississippi to Delhi, India on *:** pm **th May...

My sister's flight was from Jackson, Mississippi to Delhi, India on *:** pm **th May, ****. This is the updated flight schedule since the earlier planned flight got cancelled in the morning. My sister has another trip schedule to Australia on the same day, after she lands in Delhi. The problem is that American Airlines cancelled the first schedule morning flight and then booked her again for the evening flight. Then they cancelled it again. This has given my sister and our family great anxiety. This is very unprofessional from the airlines. When you cancel the flight, you should be helping the customers immediately giving them new schedule asap, instead of asking them to call customer service and wait for their turn. She is traveling internationally and because of your negligence she will be missing a very important flight to Australia. This is unacceptable. American Airlines cancelled her flight twice from Jackson, while providing no help or direction to resolve the issue. The airlines should be aware that this customer has international flight to Delhi which is a long trip and possibly important one. There were other airlines operating at the airport, you could have got a ticket from another airlines to a connecting city and then got her into a flight which was traveling to Delhi, India. There were sensible solutions available, but the airlines asked the customers to use call helpline which has wait-time of over * hours. American airlines have reschedule my sister's international itinerary twice and cancelled it. Is it too much to ask to help the person immediately rather than asking her to wait for your callback?