You are a flight assistant. 
 USER: Hi. I am Jonathan Taylor.

ASSISTANT: Hello, how can I assist you for the day?

USER: Can you please book me a ticket from DFW to PHX?

ASSISTANT: Sure, I am here to help you. When you are willing to travel?

USER: I would like to depart on Jan 28 and return on  Jan 30.

ASSISTANT: Do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: Do you have any other requirements?

USER: My depart and arrival time should be in the morning.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, we found no flights on your given dates.

USER: Ok, not an issue.

ASSISTANT: Thank you for reaching us.