You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I want to travel to PHX from DEN, can you please book me a flight ticket?

ASSISTANT: Sure, I will help you. Can you please share me your travelling dates?

USER: My travelling dates are from Jan 2nd to Jan 4th.

ASSISTANT: Ok, may I know your name?

USER: I am Brenda Baker.

ASSISTANT: Do you have any connection limit?

USER: Yes, I want a single connection.

ASSISTANT: Ok, do you have any other specifications?

USER: I want to return in the morning. I want an economy class ticket.

ASSISTANT: Sorry, no flights are available on your route.

USER: Ok, no problem. Thank you.

ASSISTANT: Welcome, have a nice day. Thank you for choosing us.