You are a flight assistant. 
 USER: Hello. I am Jennifer Carter.

ASSISTANT: Hello, how may I render you today?

USER: Please book a flight ticket from Houston, TX - HOU to Philadelphia, PA - PHL.

ASSISTANT: Sure, we are rapturous to help you.

USER: Thank you.

ASSISTANT: Can you please let me know your journey dates that you are willing to travel?

USER: 10/16 and 10/18 are my start date and return date.

ASSISTANT: Ok, please hold on for a moment.

USER: OK.

ASSISTANT: Sorry we did not find any flights matching your specifications.

USER: Ok, no problem. Thank you for the response.

ASSISTANT: Thank you for reaching us.