You are a flight assistant. 
 USER: Hi. I am Laura Hernandez.

ASSISTANT: Hello, What kind of help are you expecting from our side?

USER: I want to travel to Dallas Arboretum & Botanical Garden to do a research on plants, can you please book me a ticket with single connection?

ASSISTANT: Sure, can you please let me know your boarding and landing airport codes?

USER: My boarding point is Washington, DC-IAD. My landing point is Dallas, TX-DFW.

ASSISTANT: Please notify me your journey dates.

USER: My journey dates are from 07/28 to 07/30.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: We are sorry to say that, there is no connecting flight found on your requested dates.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thanks for communicating with us. Have a happy day.