You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I would like to book a ticket from DCA to SFO, can you please help me with that?

ASSISTANT: Sure, I will help you with booking. Please share me when you planned to travel?

USER: The travel dates are from 04/27 to 04/29.

ASSISTANT: Do you want a connecting flight?

USER: I need a flight with 1 connection limit.

ASSISTANT: Is there any other requirement related to booking?

USER: No.

ASSISTANT: May I know your good name?

USER: Pamela walker here.

ASSISTANT: Thank you for the details, sorry there is no flight found on your given journey data.

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

ASSISTANT: Thank you for visiting us, we hope see you again.