You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

USER: Can you help me to book a ticket from Detroit, DTW to Las Vegas, LAS?

ASSISTANT: Sure, when are you planning to travel?

USER: Ok, please can you help me to book a ticket for the dates May 12th and May 14th respectively?

ASSISTANT: Any requirements to be met?

USER: Ok, please make sure to book a flight which has single connection limit.

ASSISTANT: Can you mention your name please?

USER: My name is Rebecca Hall.

ASSISTANT: Sorry, no flights found as per your requirement.

USER: That is ok, thank you for providing the information.

ASSISTANT: Thank you for contacting us.