You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER:  Can you please book a flight ticket in economy class?

ASSISTANT: Sure, please share your journey dates?

USER: My travelling dates are 21 Apr and 23 Apr.

ASSISTANT: May I know your airport codes?

USER: My airport codes are SFO and ORD.

ASSISTANT: Do you have any specifications?

USER: I want to return in the evening.

ASSISTANT: Can I have your name to proceed?

USER: My name is Catherine Martin.

ASSISTANT: We found a flight in Hawaiian airlines, flight number is 1003 with single connection and price is 300 economy class return time at 2:00AM. Shall I proceed?

USER: Yes, please.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for choosing us.