You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am planning to attend a LGBT Festival with my family, can you help me with booking?

ASSISTANT: May I know your trip dates to reserve your seat.

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

ASSISTANT: Sure, can I know your name?

USER: I am David Smith.

ASSISTANT: To proceed further I need your source and destination codes.

USER: My airport codes are LAX to EWR.

ASSISTANT:  Could you let us know if you have any class preference?

USER: No.

ASSISTANT:  Is there any other requirements for this trip?

USER: No.

ASSISTANT: There is a connecting flight-1001 in economy class, is it ok for you?

USER: Ok.

ASSISTANT: Ok, booking is done on UA airlines.

USER: Thank you.

ASSISTANT: Welcome, have a happy trip.