You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: I am Carol Gonzalez. I am looking for a flight from Houston, can you book me the flight ticket from IAH to IAD?

ASSISTANT: Sure, please share me your trip dates.

USER: My trip dates are from July 12th till July 14th.

ASSISTANT: Do you need any specifications?

USER: I need a economy class flight.

ASSISTANT: Please wait for a while.

USER: Check for connecting flight.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: That's ok, not an issue. Thank you for reaching us.

ASSISTANT: Thank you for reaching us.