You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello.

USER: I am Nancy Williams.

ASSISTANT: How may I help you?

USER: I would like to visit Arizon Desert in Phoenix, AZ - PHX. Can you please book me a connecting flight?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Let me know the airport code, that you wish to board from?

USER: I want to board from Washington, DC - DCA.

ASSISTANT: When you have scheduled to depart and arrive?

USER: My trip dates are 04/11 - 04/13.

ASSISTANT: Will you prefer either business class or economy class for your journey?

USER: I prefer Business class for my journey.

ASSISTANT: Thank you for sharing the details, wait for a while.

USER: Sure.

ASSISTANT: Thanks for your time.

USER: Ok.

ASSISTANT: Unfortunately, there are no flights running on your route.

USER: That's ok, not an issue. Thank you.

ASSISTANT: Thank you for availing us.