You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Raymond Allen here. Book a ticket from HOU to ORD, make sure that could be a connecting flight.

ASSISTANT: On which dates you are willing to travel?

USER: The travelling dates are 11/25 and 11/27.

ASSISTANT: There is no flights available.

USER: That's fine, not an issue. Thank you.

ASSISTANT: Most welcome.