You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: Emily Jones here. I would like to travel from DTW to CLT. can you please help me to book a ticket?

ASSISTANT: Sure, Please help me with your travel dates.

USER: My travelling dates will be on 07/19 to 07/21.

ASSISTANT: Please wait a minute.

USER: OK.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Not an issue, thank you.

ASSISTANT: Thank you for opting us.