You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Mary Edwards here, I need to travel from HOU to PHL, can You please help me in flight ticket booking?

ASSISTANT: Sure, I will help you with that. Can you please share your travel dates?

USER: My travelling dates are 06/03 and 06/05.

ASSISTANT: Ok, please wait a minute.

USER: Take your time.

ASSISTANT: Sorry to inform you, there are no flights available in this route on the dates you have given.

USER: That's not an issue, I will choose any other source to travel that place.

ASSISTANT: Ok, thank you for reaching us. Have a nice day.

USER: Thank you for your service.