You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello. How may I help you today?

USER: I am Andrew Williams. I want to book a ticket from HOU, can you please reserve me a ticket with single connection?

ASSISTANT: Sure, may I know your destination airport code?

USER: My destination airport code is IAH.

ASSISTANT: May I know your travelling dates, please?

USER: My depart and arrival dates are Nov 11th and Nov 13th.

ASSISTANT: Please wait a moment.

USER: Sorry, my travel dates are from Nov 14th to Nov 16th.

ASSISTANT: Sorry, there are no flight tickets available on your journey dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching our service.