You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Can you please book a flight ticket from HOU to OAK?

ASSISTANT: Please provide your trip dates.

USER: Thank you. I have planned my travel dates as Feb 19 and Feb 21.

ASSISTANT: Which class do you prefer?

USER: I would prefer business class to travel.

ASSISTANT: May I know your connection limit?

USER: I am looking for single connecting flight so please check with that.

ASSISTANT: Please give me a moment.

USER: Sure, take your time.

ASSISTANT: May I know your name?

USER: Sure, myself Melissa Brown.

ASSISTANT: Sorry Melissa Brown, no flights are available on your route.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.