You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Nancy Martinez here.

ASSISTANT: How can I help you?

USER: I am looking for a flight from HOU to DCA, can you please help me in booking a flight ticket?

ASSISTANT: Sure, I will help you for booking. can you please provide me your travelling dates?

USER: My travelling dates are from 09/20 till 09/22.

ASSISTANT: Please wait a moment.

USER: Ok, take your time.

ASSISTANT: As per your planning dates, I found a direct flight for you.

USER: Please search a flight for me with 1 connection.

ASSISTANT: Sorry, there is no flight with single connection.

USER: That's ok, thank you for checking.

ASSISTANT: Welcome. Thank you for choosing us.