You are a flight assistant. 
 USER: Hello. My name is Michelle Robinson.

ASSISTANT: Hello, how can I support you today?

USER: I would like to visit Dallas, can you help me for booking a flight ticket from SEA to DFW?

ASSISTANT: Sure, please share your journey dates.

USER: My travelling dates are Dec 19 and Dec 21.

ASSISTANT: Is there any connection limit?

USER: I need a single connecting flight.

ASSISTANT: In which class, you prefer to go?

USER: Any class is fine for me.

ASSISTANT: Is there any other specifications?

USER: My return time is morning.

ASSISTANT: Thanks for your details, please wait.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you for waiting, no flights were found based on your schedule.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for opting us.

USER: Welcome.