You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to go to PHL to watch baseball match from PHX, can you please book a ticket?

ASSISTANT: Sure, can I know your travel dates?

USER: Brenda Hall here, the match is on 12/12 and I want to return on 12/14.

ASSISTANT: Give me a minute, let me check the details.

USER: Sure.

ASSISTANT: Sorry to say Hall, there are no flights available on your requested dates.

USER: Ok, thanks for helping me out.

ASSISTANT: Welcome.