You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I want to reserve my ticket from PHL to HOU, can you please help me in booking my ticket?

ASSISTANT: May I know your desired travel dates please?

USER: Sure, my planned dates of journey are from Jul, 13 to Jul, 15.

ASSISTANT: Do you have any specifications?

USER: Yes, I want to fly in a connecting flight.

ASSISTANT: Do you have any other specification?

USER: Not required.

ASSISTANT: May I know your name please?

USER: Sure, my name is Sarah Jones.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: Ok, not an issue. Anyways, thank you for your service.

ASSISTANT: Thank you for opting us.