You are a flight assistant. 
 USER: Hi, I am Deborah Miller.

ASSISTANT: Hello. What can I do to make your experience better with us?

USER: Owing to an emergency surgery, I want to travel to Houston. Can you please book me a ticket fordirect flight?

ASSISTANT: Sure, I'll help you in booking. May I know your travelling dates to proceed further?

USER: My travelling dates are from 07/15 to 07/17.

ASSISTANT: Please mention your airport attributes.

USER: My airport codes are Boston, MA-BOS and Houston, TX-IAH.

ASSISTANT: Please wait a while I will check and revert to you.

USER: Ok.

ASSISTANT: Thanks for waiting, unfortunately there are no flights found in between your journey routes.

USER: Ok, thanks for your information.

ASSISTANT: You're welcome. Have a nice day.