You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: I want to change my reservation, can you help me with that?

ASSISTANT: Sure, I am here to help you with that, can I know your good name to proceed further?

USER: Edward Perez here.

ASSISTANT: I found your reservation, may I know your new travelling dates?

USER: My trip dates are Apr 05 and 07.

ASSISTANT: Please mention your nearest airport codes.

USER: I want to start from AUS and land at LAX.

ASSISTANT: Do you have any airline preference?

USER: I am comfortable with any airline.

ASSISTANT: Is there any other specifications?

USER: Usually, I prefer to travel in connecting flight.

ASSISTANT: Please wait for some time.

USER: Sure.

ASSISTANT: Sorry, no flights are found on your trip dates.

USER: Ok, thank you.

ASSISTANT: Thank you for reaching us.