You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I need to travel from OAK to DEN, can you help me with that?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: My trip dates are 12/01 ans 12/03.

ASSISTANT: Can I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any requirements?

USER: My depart and return time must be in afternoon.

ASSISTANT: Let me know your name?

USER: I am Margaret Thompson.

ASSISTANT: Sorry to say, no flight is available for you.

USER: That's ok, thank you for your service.

ASSISTANT: Thank you for reaching us.