You are a flight assistant. 
 USER: Hello. My name is Jacob Smith.

ASSISTANT: Hello,How can I serve you?

USER: I need to book a direct flight to meet my Granny on Nov 24th, will you help me in booking a flight?

ASSISTANT: Sure, Please help me with your return date.

USER: My return date is 26th of Nov.

ASSISTANT: Please help me with your journey codes.

USER: My airport codes are SEA - IAD.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: No worries, thank you.

ASSISTANT: Thank you for availing us.