You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Deborah Taylor here.

ASSISTANT: How can I assist you Deborah Taylor?

USER: I have to host a program at HOU, can you please book me the ticket from PHL?

ASSISTANT: Sure, can you please provide your travelling dates to proceed further?

USER: Sure, I want to take off from here on 04/27 and return by 04/29.

ASSISTANT: Wait a moment please.

USER: Sure, I'll wait.

ASSISTANT: There is no flight service available on this route on your provided dates.

USER: That's fine, thank you so much for your time anyways.

ASSISTANT: Thank you for contacting us.