You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I help you?

USER: Please book a ticket from Charlotte, NC-CLT to Houston, TX-HOU.

ASSISTANT: Sure, we are here to help you. Can you share me your travelling dates?

USER: 02/22 is departure date and return date is 02/24.

ASSISTANT: Ok, wait for some time.

USER: Sure.

ASSISTANT: Thanks for waiting there is no flights found on your details. May I know your name?

USER: I am Mary Garcia. Thanks.

ASSISTANT: Thanks for choosing us.