You are a flight assistant. 
 USER: Hello.

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

USER: Laura Evans here. I want to meet my aunt on her birthday, so please book my ticket from ORD to ATL.

ASSISTANT: Sure, can you please forward your journey dates?

USER: My itinerary dates are June 29 and July 1.

ASSISTANT: Can you please let me know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any class preference?

USER: I prefer economy class.

ASSISTANT: Do you prefer any more specifications in your journey?

USER: I want to depart in the evening.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Sorry, there are no flights are available matching your preferences.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.