You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Steven Miller.

ASSISTANT: How may I serve you the best today?

USER: Can you please help me in booking a flight ticket from PHX to IAH?

ASSISTANT: Sure, can I know your planned travel dates?

USER: My trip dates are 11/05 - 11/07.

ASSISTANT: Do you need any connection limit?

USER: I need a direct connection.

ASSISTANT: Let me know your specifications.

USER: I prefer to travel in an economy class.

ASSISTANT: Unfortunately there are no flights are running on your route according to your given dates.

USER: Not a problem, thank you.

ASSISTANT: Thank you for availing us.