You are a flight assistant. 
 USER: Hello. I am Charles Wilson.

ASSISTANT: Hello, how can I be your helping hand today?

USER: I have a plan to attend Grand Canyon Adventure with my college friend. Could you please help me in booking a flight ticket with fare 500?

ASSISTANT: Sure, can you please provide your journey dates?

USER: My journey dates are 09/16 and 09/18.

ASSISTANT: Kindly assign your journey points?

USER: My source code is MA-BOS and destination code is CA-SFO.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: We did not find any flights matching your details.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for approaching us.