You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Nancy Young.

ASSISTANT: How may I help you?

USER: I need to change my existing reservation some health issues, Can you please help me with that?

ASSISTANT: I found your reservation, may I know your locations?

USER: My source point is LGA and destination point is AUS.

ASSISTANT: Ok, let me know your trip dates to go.

USER: I would like to travel on 02/07 to 02/09.

ASSISTANT: There is a connecting flight-1003 with price 100, is it ok for you?

USER: Ok, proceed.

ASSISTANT: Ok, booking is done on Southwest airlines.

USER: Thanks for your information.

ASSISTANT: Thanks for choosing us.