You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you please book a ticket from OAK to IAH? As I need to attend a wedding.

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: Sure, my planned departure and return travel dates are 4th and 6th of November.

ASSISTANT: Do you like to go with a economy class or business class?

USER: I'm ok with any class.

ASSISTANT: May I know your other specifications?

USER: I prefer single connected flight.

ASSISTANT: Ok, please share your name to proceed further.

USER: My name is Catherine Davis.

ASSISTANT: Sorry, no flight is available for you as per your requests.

USER: That's ok, thank you for giving the information anyways.

ASSISTANT: Welcome Catherine Davis.