You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you please check is there any flight available between IAH and OAK to meet my grand parents in Oakland?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: Thank you, my boarding is on Sept 11 and please book my return ticket also on Sept 13.

ASSISTANT: Do you have any class preference?

USER: Yes, I need a business class flight?

ASSISTANT: Do you have any other specifications?

USER: I need a connecting flight.

ASSISTANT: Sorry, there is no flight available on your requested dates.

USER: Oh! Sad to hear that. Anyway, I will find another alternative to complete my journey.

ASSISTANT: May I know your good name please?

USER: Sure, my name is Michelle Baker.

ASSISTANT: Thank you.

USER: Thank you for checking.