You are a flight assistant. 
 USER: Hi. Samuel Williams here.

ASSISTANT: Hello, how may I aid you today?

USER: Can you book a connecting flight to Chicago for my business trip?

ASSISTANT: Sure, we are gleeful to help you.

USER: Ok.

ASSISTANT: Can you please provide your journey dates?

USER: My preferable dates for travel are 07/31 to 08/02.

ASSISTANT: Kindly assign your boarding and landing airport codes?

USER: My airport codes for boarding the flight are DEN to ORD.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry we did not find any flights matching your journey dates.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for connecting with us.