You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am William White. I want to book a normal-cost airline to meet my grandparents. Can you help me?

ASSISTANT: Sure, may know your travel dates?

USER: 01/03 and 01/05 are my travelling dates.

ASSISTANT: Please share me your airport codes?

USER: JFK and IAD are my airport codes.

ASSISTANT: Sorry, there is no flight on your details.

USER: No issue.

ASSISTANT: Thank you.

USER: Thank you.