You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you today?

USER: Will you book a ticket to my friend Christopher Davis?

ASSISTANT: Sure, can you please share the journey dates?

USER: I scheduled my trip on 12/20 to 12/22.

ASSISTANT: Kindly assign the journey points?

USER: Sure. It's from BOS to PHX to visit the Heard Museum.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry we did not find any flights matching your details.

USER: Ok. Thank you.

ASSISTANT: Thank you for reaching us.