You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I serve you?

USER: I want to book a ticket from IAH to PHX.

ASSISTANT: May I know your planned trip dates?

USER: Departure date is July, 5 and return by July, 7.

ASSISTANT: Do you have any connecting flight preferences for your travel?

USER: I would be comfortable with single stop over.

ASSISTANT: Is there any other concern?

USER: No, thanks for asking.

ASSISTANT: Please share your name to proceed further?

USER: My name is Ruth Williams.

ASSISTANT: No flights found as per your preferences at the moment.

USER: Thank you.

ASSISTANT: Thank you for choosing us.