You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My name is Melissa Adams, can you help me to book a flight ticket from ORD to CLT?

ASSISTANT: Your travelling dates please?

USER: Ok, please can you help me to book a flight for the dates Jan 21 and 22 Jan respectively?

ASSISTANT: Do you have any specification?

USER: Yes, I need a direct flight which depart during afternoon.

ASSISTANT: I am sorry no flights found on your route.

USER: Ok, that is not a problem. Thank you for the information.

ASSISTANT: Than you for choosing us.