You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Amy Lopez.

ASSISTANT: Good afternoon, how can I help you?

USER: I want a flight with single connection, can you help me in booking?

ASSISTANT: Sure, when and where you want to travel?

USER: I want to travel on 02/11 to 02/13.

ASSISTANT: Your airport codes please?

USER: I will start from CLT and end at DTW.

ASSISTANT: I am sorry Mr.Amy Lopez, no flights found on your dates. Do you have any other dates to fly?

USER: No issue, thank you for checking.

ASSISTANT: Thank you for choosing us.

USER: No, I didn't plan yet.