You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Deborah Perez.

ASSISTANT: How can I help you today?

USER: I am looking to book a flight ticket from IAD to IAH to meet my friend. Can you help me for booking a flight ticket?

ASSISTANT: Sure, I am glad to help you in booking. Can you please share your travel dates?

USER: My travelling dates are 03/18 and 03/20.

ASSISTANT: Please hold on for a while.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, no flights are available on your particular travel dates.

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

ASSISTANT: Thank you for choosing us, have a nice day.