You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Myself Sandra Parker. As there an emergency, I need to travel from DFW to DCA. Can you help me in booking a  flight?

ASSISTANT: Sure, please share me your journey dates?

USER: I will fly on 10/10 and reaching date is 10/12.

ASSISTANT: OK, please wait for few minutes, let me check and revert you.

USER: Sure.

ASSISTANT: Sorry to inform you that there is no flight with your requirement.

USER: No issue, I will try with other alternative. Thank you for your time.

ASSISTANT: Thank you, for reaching us.