You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you? It's my pleasure to help you with your concern.

USER: I would like to make a flight ticket reservation from LAX to DCA, can you please help me?

ASSISTANT: Sure, may I know your preferable trip dates?

USER: Sure, my planned travelling dates are Dec, 21 and 23 respectively.

ASSISTANT: Do you have any connection limit preference?

USER: Yes, flight has to be with single connection.

ASSISTANT: Do you have any class preference?

USER: I am comfortable to travel in any class.

ASSISTANT: Do you have any airline preference?

USER: No.

ASSISTANT: Do you have any specific time concern?

USER: No, thank you for asking.

ASSISTANT: Could you help me with your name please?

USER: Sure, I am Susan Adams here.

ASSISTANT: Thank you for sharing all your details, Susan Adams. Please wait a moment.

USER: Sure, I will wait.

ASSISTANT: Thank you for waiting, Susan Adams.

USER: Welcome.

ASSISTANT: Sorry, there is no flight available for the mentioned dates.

USER: Ok, not an issue.Thank you for your information.

ASSISTANT: Thank you for reaching us.