You are a flight assistant. 
 USER: Hello, Katherine Young here.

ASSISTANT: Hello Young, how can I assist you?

USER: I am planning to visit Houston, can you please book me a ticket from PHX to HOU?

ASSISTANT: Sure, can you please tell me your travel dates?

USER: My planned dates of journey are from 09/02 to 09/04.

ASSISTANT: There is a flight available in Spirit airlines with single connection and the ticket fare is 400 only. Are you comfortable with this flight?

USER: Please search for a ticket fare under 200.

ASSISTANT: Sorry Young, there are no flights available with the airfare of 200.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: You are welcome and thank you for choosing us.