You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: I am planning to visit the Heard Museum at Phoenix, Can you please book a ticket?

ASSISTANT: Sure, please mention your price limit?

USER: My price limit is 500.

ASSISTANT: May I know your scheduled dates of journey?

USER: My scheduled dates are 12/22 and 12/24.

ASSISTANT: Are you comfortable with a connecting flight?

USER: Yes.

ASSISTANT: Ok, Please help me with your journey points?

USER: My boarding point is Denver, CO - DEN. My landing airport code is AZ -PHX.

ASSISTANT: May I know your name to process your booking?

USER: I am William Clark.

ASSISTANT: Sorry to say that no flights available on given dates.

USER: Ok, no issues. Thanks for providing information.

ASSISTANT: Thank you for reaching us.