You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

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

ASSISTANT: Sure, I will help you with that. Can you please provide your preferable dates of travelling?

USER: My trip dates are 21 Feb and 23Feb.

ASSISTANT: On whose name I have to book the flight ticket?

USER: Amanda Martin here.

ASSISTANT: Do you have any class preference?

USER: Make sure that connection limit is 1.

ASSISTANT: Any class preference do you have?

USER: I prefer to travel in economy class.

ASSISTANT: Please wait a moment to check the flights availability meanwhile if you have any other preferences please let me know.

USER: No other preferences for me, you can proceed for booking.

ASSISTANT: Unfortunately there are no flights running on your route with your required preferences.

USER: Not a issue.

ASSISTANT: Thank you for reaching us, have a great day.

USER: Thank you.

ASSISTANT: Welcome.