You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you today?

USER: I am Edward Miller. Can you please book a ticket for me as I am planning to go to museum of fine arts at Boston, BOS?

ASSISTANT: Sure, we are happy to support you. Please provide your travelling dates?

USER: My depart is on 04/19 and return is on 04/21.

ASSISTANT: May I know your take off point?

USER: Source code is Oakland, OAK.

ASSISTANT: Thank you for your details. I hardly tried to find flights for you, but I regret that there are no flights available.

USER: No problem. Thank you.

ASSISTANT: Thank you for reaching us.