You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Deborah Collins.

ASSISTANT: What service do you need from our travel agency?

USER: I am planning to visit Oakland, can you please book me a ticket with direct flight?

ASSISTANT: Sure, I will search a flight for you. Can you please tell me your travel airport codes?

USER: My nearest airport codes of travel are from IAH to OAK.

ASSISTANT: Ok, may I know your travel dates?

USER: My planned dates of journey are from 04/07 to 04/09.

ASSISTANT: Sorry to inform you, there is no flight found with connection limit 0 in this route.

USER: Ok, not an issue. I will find any alternate for this trip. Thank you for providing information.

ASSISTANT: Ok, thank you for reaching us. Have a nice day.