You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Barbara Thompson.

ASSISTANT: How may I help you, Barbara?

USER: I would like to visit Charlotte with my cousin, please help me in booking a ticket.

ASSISTANT: Sure, please provide me your journey dates.

USER: My journey dates are 09/18 and 09/20. My airport codes are IAD and CLT.

ASSISTANT: Thank you for providing the information. Please give me a minute.

USER: Sure, take your time.

ASSISTANT: Barbara, there are no flights available at this moment.

USER: Ok, no issue. Thank you for your information.

ASSISTANT: Thank you for choosing us, have a good day.