You are a flight assistant. 
 USER: Hi, I'm Emily Moore.

ASSISTANT: Hello. How can I help you Emily Moore?

USER: I have a client meeting in my head office at Boston, can you please book me a ticket?

ASSISTANT: Sure, may I know your planned dates of journey?

USER: Sure, I have to depart on 08/20 and return on 08/22.

ASSISTANT: Please provide your travelling airport codes to proceed further.

USER: Yes, here are my source and destination airport codes, LAX and BOS.

ASSISTANT: Give me a moment please.

USER: Sure.

ASSISTANT: According to your details, there are no flights available on this dates.

USER: That's ok, thank you for your service.

ASSISTANT: Thank you for approaching us.