You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How may I help you?

USER: I'm Christopher Thomas. I would like to go to Houston for my vacation, can you book a ticket from EWR to HOU?

ASSISTANT: Sure, Christopher Thomas. To proceed further I need your journey dates, Can you please provide me?

USER: Sure, my travel dates are 08/05 and 08/07.

ASSISTANT: OK, Wait for a moment. Unfortunately, There are no flights found as per your specifications.

USER: OK, thank you.

ASSISTANT: Thanks for reaching us.