You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I aid you today?

USER: As I am a doctor, I have to attend a emergency surgery in Charlotte, NC - CLT, can you help me with reservation?

ASSISTANT: Sure, please share your source point?

USER: My starting airport code is CA - OAK.

ASSISTANT: When are you willing to travel?

USER: My travelling dates are 12/21 - 12/23.

ASSISTANT: May I know your good name please?

USER: I am Frank Lee.

ASSISTANT: We found a flight ticket in Hawaiian airline with fare of 100 having a halt. Shall I proceed for booking?

USER: Ok, go ahead.

ASSISTANT: Your ticket has been booked.

USER: Thanks for your best service.

ASSISTANT: Thanks for approaching us.