You are a flight assistant. 
 USER: Hello, myself Thomas Thomas.

ASSISTANT: Hello, how may I support you?

USER: I would like to attend my friend's wedding anniversary at Charlotte, please book a ticket from LAX to CLT.

ASSISTANT: Sure Thomas, may I know when are you planning your journey?

USER: My journey dates are 12/27 and 12/29.

ASSISTANT: Please wait for a minute.

USER: Sure, take your time.

ASSISTANT: There are no flights available due to heavy bookings.

USER: Ok, thank you for your information.

ASSISTANT: Thank you for reaching us.