You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Larry King from Philadelphia.

ASSISTANT: Ok, how can I help you today?

USER: Could you please help me in flight ticket booking process from PHL to HOU?

ASSISTANT: Please provide me the travelling dates.

USER: Thank you for your response, I want to take off on Sept 02 and confirm my return ticket also on Sept 04.

ASSISTANT: Please wait a while, I will check the best flight for you.

USER: Sure.

ASSISTANT: Sorry, no flight services available on this route on your provided dates.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Thank you for contacting us.