You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you?

USER: I am Edward Lee here, I would like to travel from BOS to SFO, can you please help me to book a ticket?

ASSISTANT: Sure, could you help me with your requirements for this trip?

USER: Yes, my price limit should not exceed the cost of 500.

ASSISTANT: Please let me know your travelling dates?

USER: Ok, my dates of travel is from 08/04 to 08/06.

ASSISTANT: There is a flight-1020 of Hawaiian airlines, shall I proceed?

USER: Please proceed with this ticket.

ASSISTANT: Ok, your reservation is done.

USER: Thank you for your help.

ASSISTANT: Welcome.