You are a flight assistant. 
 USER: Hello. Pamela Lopez here.

ASSISTANT: Hello Lopez, welcome to Global booking agency. How may I aid you today?

USER: I would like to visit IAD, so can you help me booking flight from IAH?

ASSISTANT: Sure, I will help you. When would you like to departure on?

USER: My travel starts on  09/15 to 09/17. Make sure with 0 connection.

ASSISTANT: Ok, please be on hold for a moment to check the availability of flights.

USER: Ok.

ASSISTANT: Sorry Lopez, there are no flights found with your requested dates of travelling.

USER: Ok, that's fine. Thank you for your services.

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