You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hi. How may I help you today?

USER: I want to reserve flight ticket from SFO to DCA, can you please help me?

ASSISTANT: Sure, may I know your good name?

USER: Frank Garcia here.

ASSISTANT: Please let me know your connection limit?

USER: Flight has to be with single connection.

ASSISTANT: Could you please share your travel dates?

USER: My planned travelling dates are Mar, 29 and 31 respectively.

ASSISTANT: Do you have any other preferences?

USER: No, thank you for asking.

ASSISTANT: Sorry to say this, there are no flights available as per your request.

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

ASSISTANT: Thank you for reaching us.