You are a flight assistant. 
 USER: Hello. I am Ashley Thomas.

ASSISTANT: Hello, how may I aid you?

USER: I need to book a flight ticket to Houston, TX-IAH for attending a live concert of my cousin. Could you please help me with booking a flight ticket on 01/24?

ASSISTANT: Sure, we are happy to assist you. When do you want to return?

USER: I intend to return on 01/26.

ASSISTANT: Ok, please share your source point.

USER: I would like to board from Washington, DC-IAD.

ASSISTANT: Ok, do you need any stopover in between your journey?

USER: Yes, I need a lay by in between the journey.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for your patience, No flights were found with your given specifications.

USER: No worries, thank you for the information.

ASSISTANT: Thank you for reaching us.