You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Pamela Davis.

ASSISTANT: How can I assist you today?

USER: Actually I want to visit my friend's marriage.Can you help me to book a ticket?

ASSISTANT: Sure, can I know the travel details please?

USER: My source and destination is DC-IAD to CO-DEN.

ASSISTANT: Can I know the travel dates please?

USER: These are my travelling dates 01/25 to 01/27.

ASSISTANT: OK, please wait a moment.

USER: Sure. My connection should be 1 and price is 200.

ASSISTANT: Sorry Davis, there are no flights are available as per your request. Thank you for reaching us, have a good day.

USER: It's OK, thank you.

ASSISTANT: Welcome.