You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I am Edward Scott, can you help me to book a flight from IAD to ORD?

ASSISTANT: Sure, could you please share me with your dates of journey?

USER: My journey dates are 05/13 and 05/15.

ASSISTANT: Sorry Scott, there is no flight found as per your travelling details.

USER: Ok, no issues. Thank you for your time.

ASSISTANT: You are welcome and have a great day.