You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I provide service to you?

USER: Can you please help me to book a ticket from LAX to OAK?

ASSISTANT: Sure, may I know your good name?

USER: My travelling dates will be on May 24 to May 26. Larry Lewis here.

ASSISTANT: Do you have any class preference?

USER: Yes, I would prefer business class.

ASSISTANT: Is there any more specifications?

USER: I need a connecting flight.

ASSISTANT: Ok, please wait for a moment.

USER: I want to depart in the evening.

ASSISTANT: Sorry, there are no flights available as per your requirements.

USER: Ok, I will wait. Ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us.