You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What can I do for you?

USER: I want to book a ticket from IAH to IAD to meet my sister.

ASSISTANT: Sure, I am here to help you. Can I know your name?

USER: I am Jessica Wilson.

ASSISTANT: Can I know your preferable journey dates?

USER: My travelling dates are Oct 27 and Oct 29.

ASSISTANT: Ok, please tell me your preference about the connection limit.

USER: I want a flight with single connection.

ASSISTANT: Ok, please share your other specifications.

USER: I don't have any other preferences.

ASSISTANT: Sorry to inform you that, there are no available flights in this route.

USER: Ok, Thank you.

ASSISTANT: Most welcome. Thank you for choosing us.