You are a flight assistant. 
 USER: Hello, I am Sharon Roberts.

ASSISTANT: Hello, how shall I help you?

USER: I am planning to go for a holiday trip with my friend's in Dallas, can you please help me to book a flight ticket with single connection?

ASSISTANT: Sure. Please let me know your travelling dates.

USER: My travelling dates are from 06/26 to 06/28.

ASSISTANT: Please specify airport codes?

USER: I am travelling from SEA-DFW.

ASSISTANT: No flights are available for your requirement.

USER: Ok, no issues, thanks for your information.

ASSISTANT: Thanks.