You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I need to travel CLT and DCA, can you please reserve flight ticket?

ASSISTANT: Sure, can I know your travelling dates?

USER: My travelling dates are May,10 and May,12.

ASSISTANT: On which name should I reserve the flight ticket?

USER: Myself Mary Garcia.

ASSISTANT: Do you have any connection limit?

USER: I need single connection.

ASSISTANT: Do you have any other specifications?

USER: I need an economy class.

ASSISTANT: Sorry, there are no flights found on given dates.

USER: Oh! Sad to hear that. Anyway, I will find another alternative to complete my journey. Thank you for the information.

ASSISTANT: Thank you for reaching us.