You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Gary Davis here.

ASSISTANT: How can I assist you?

USER: I want to book a ticket from SEA to BOS, to see Trinity Church in Boston.

ASSISTANT: Sure, may I know your preferable dates?

USER: My trip starts on 02/07 and returning 02/09.

ASSISTANT: Sure, give me a minute.

USER: Ok.

ASSISTANT: Sorry to say that there is no flight  found on your name.

USER: It's ok, no issues. Thank you.

ASSISTANT: Welcome.