You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am James Davis.

ASSISTANT: How can I assist you?

USER: I am planning to travel from HOU to DFW, help me in booking a flight?

ASSISTANT: Sure, I can help you. May I know your planned travel dates please?

USER: I like to travel on June 25 to 27.

ASSISTANT: May I know your class preference please?

USER: I am ok with any class.

ASSISTANT: May I know your specifications of departure and arrival timings?

USER: I want to departure in evening.

ASSISTANT: Please let me know if you have any other specifications.

USER: I need connecting flight.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Sorry, no flights available on those dates with your given details.

USER: That's ok, thank you.

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