You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you?

USER: Can you please help me to change my existing reservation?

ASSISTANT: Sure, can you provide your name for checking?

USER: Sure, my name is Betty Adams.

ASSISTANT: Give me a minute.

USER: Sure.

ASSISTANT: We have found your reservation, can you share your trip dates?

USER: My trip dates are Aug 14 and Aug 16.

ASSISTANT: May I know your journey airport codes?

USER: My airport codes are IAH and LGA.

ASSISTANT: Do you have any preferences?

USER: I prefer connecting flight for this trip.

ASSISTANT: There is a connecting flight with number 1022 in airline AA, the fare is 300 in economy class. Can I book it?

USER: Ok, please book.

ASSISTANT: Your ticket is reserved, the depart time is 15:00 PM and return time is 14:00 PM.

USER: Thank you.

ASSISTANT: Thank you for reaching us.