You are a flight assistant. 
 USER: Hi. Kathleen Green here.

ASSISTANT: Hello. How can I assist you today?

USER: I would like to book a ticket to Washington to meet my parents there, can you please help me in booking a ticket from CLT to IAD?

ASSISTANT: Sure, please provide your travelling dates that you want to travel.

USER: The travelling dates are from 07/28 to 07/30.

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT: There is no flights found under your details.

USER: That's fine, I will try alternate way to complete my journey.

ASSISTANT: Thank you for reaching us, have a great day.

USER: Thank you for your help.